By Reuters, via The Guardian Hundreds of people who say they worry oil that would be carried by the Keystone XL pipeline will accelerate climate change marched around the White House on Sunday, hoping to revive a movement credited with slowing down the permit process for the crude oil project. The protesters chanted “Hey, Obama! [...]

We heard both candidates discuss alternative energy at this week’s presidential debate in Denver. President Obama said, “we’ve got to look at the energy sources of the future, like wind and solar and biofuels, and make those investments.” The support for alternative energy sources, however, is not universal. Need to Know asked leading experts in [...]

Solar energy is one of the easiest and greenest of the renewable energy sources, but its high price is holding it back. One of the most promising new research developments involves printing thinner, cheaper panels with an inkjet.

Need to Know is a production of Creative News Group (CNG) in association with WNET. Marc Rosenwasser is Executive Producer. Need to Know is made possible by Bernard and Irene Schwartz, Mutual of America, Citi Foundation, John D. and Catherine T. MacArthur Foundation, Miriam and Ira D. Wallach Foundation, Margaret A. Cargill Foundation, The Corporation for Public Broadcasting and PBS.